import tkinter as tk

window = tk.Tk()
window.title("小A君")
window.geometry("200x200")

l = tk.Label(window,bg="yellow",width=20,text="empty")
'''width表示字符宽度'''
l.pack()

def print_selection():
    if (var1.get() == 1)&(var2.get() == 0):
        l.config(text="i love python")
    elif (var1.get() == 0)&(var2.get() == 1):
        l.config(text="i love C++")
    elif (var1.get() == 1)&(var2.get() == 1):
        l.config(text="i love python&C++")
    else:
        l.config(text="i love none")

var1 = tk.IntVar()
var2 = tk.IntVar()
c1 = tk.Checkbutton(window,text="python",variable=var1,
onvalue=1,offvalue=0,command=print_selection)
c2 = tk.Checkbutton(window,text="C++",variable=var2,
onvalue=1,offvalue=0,command=print_selection)
c1.pack()
c2.pack()
window.mainloop()
'''不断循环刷新'''

